A simple formulation for effective flexural stiffness of circular reinforced concrete columns

Çağlar, Naci; Demir, Aydın; Öztürk, Hakan; Akkaya, Abdulhalim

doi:10.1016/j.engappai.2014.10.011

Cited by 20 publications

(5 citation statements)

References 10 publications

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“…Genetic Programming (GP) is able to generate non-linear mapping between inputs and outputs, 17,29,30 consequently it is a powerful tool to deal with the Mooney viscosity correlation of non-linear characteristics. GP has been applied successfully in the eld of chemical engineering and materials science, 31 like building stationary 32,33 and dynamic 34,35 process models, optimization of distillation sequences, 36 predicting properties of inorganic materials, [37][38][39][40][41][42] and building vapor-liquid equilibrium models. 43 GP could search for the optimal formula and parameters simultaneously, resulting in compact and explainable representations, 44 which are in turn ideal for the integration with mechanistic models.…”

Section: Introductionmentioning

confidence: 99%

Combined mechanistic and genetic programming approach to modeling pilot NBR production: influence of feed compositions on rubber Mooney viscosity

Luo

Dang

et al. 2021

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Combined mechanistic and genetic programming approach to modeling pilot NBR production: influence of feed compositions on rubber Mooney viscosity

Luo

Dang

et al. 2021

RSC Adv.

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“…The stiffness of the cracked sections of RC structural systems is taken into account to determine its performance under earthquake loads. The effective stiffness of the cracked sections is obtained using the predicted stiffness reduction coefficients of the elastic stiffness value [108][109][110]. In this study, elastic stiffness (K_elas) and effective stiffness (K_eff) values were directly obtained by using the stiffness reduction coefficients estimated in the software used.…”

Section: Structural Analysismentioning

confidence: 99%

A Comparative Probabilistic Seismic Hazard Analysis for Eastern Turkey (Bitlis) Based on Updated Hazard Map and Its Effect on Regular RC Structures

Işık

Harirchian

2022

Buildings

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Determining the earthquake hazard of any settlement is one of the primary studies for reducing earthquake damage. Therefore, earthquake hazard maps used for this purpose must be renewed over time. Turkey Earthquake Hazard Map has been used instead of Turkey Earthquake Zones Map since 2019. A probabilistic seismic hazard was performed by using these last two maps and different attenuation relationships for Bitlis Province (Eastern Turkey) were located in the Lake Van Basin, which has a high seismic risk. The earthquake parameters were determined by considering all districts and neighborhoods in the province. Probabilistic seismic hazard analyses were carried out for these settlements using seismic sources and four different attenuation relationships. The obtained values are compared with the design spectrum stated in the last two earthquake maps. Significant differences exist between the design spectrum obtained according to the different exceedance probabilities. In this study, adaptive pushover analyses of sample-reinforced concrete buildings were performed using the design ground motion level. Structural analyses were carried out using three different design spectra, as given in the last two seismic design codes and the mean spectrum obtained from attenuation relationships. Different design spectra significantly change the target displacements predicted for the performance levels of the buildings.

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“…Authors in [11] presented new expressions for a beam with rectangular and T-shaped crosssections, square, rectangular and circular cross-sections for columns in function of concrete strength ƒc, steel percentage ρ, and level of charge P/P 0 . Authors in [12] presented their approach to find effective flexural stiffness for circular columns. In this research, the stiffness reduction factor was suggested to treat slender square and L-section columns with equal flanges.…”

Section: Literature Reviewmentioning

confidence: 99%

The Proposition of an EI Equation of Square and L–Shaped Slender Reinforced Concrete Columns under Combined Loading

Hamzaoui

Bouzid

2021

Eng. Technol. Appl. Sci. Res.

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The stability and strength of slender Reinforced Concrete (RC) columns depend directly on the flexural stiffness EI, which is a major parameter in strain calculations including those with bending and axial load. Due to the non-linearity of the stress-strain curve of concrete, the effective bending stiffness EI always remains variable. Numerical simulations were performed for square and L-shaped reinforced concrete sections of slender columns subjected to an eccentric axial force to estimate the variation of El resulting from the actual behavior of the column, based on the moment-curvature relationship. Seventy thousand (70000) hypothetical slender columns, each with a different combination of variables, were used to investigate the main variables that affect the EI of RC slender columns. Using linear regression analysis, a new simple and linear expression of EI was developed. Slenderness, axial load level, and concrete strength have been identified as the most important factors affecting effective stiffness. Finally, the comparison between the results of the new equation and the methods proposed by ACI-318 and Euro Code-2 was carried out in connection with the experimental results of the literature. A good agreement of the results was found.

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A simple formulation for effective flexural stiffness of circular reinforced concrete columns

Cited by 20 publications

References 10 publications

Combined mechanistic and genetic programming approach to modeling pilot NBR production: influence of feed compositions on rubber Mooney viscosity

Combined mechanistic and genetic programming approach to modeling pilot NBR production: influence of feed compositions on rubber Mooney viscosity

A Comparative Probabilistic Seismic Hazard Analysis for Eastern Turkey (Bitlis) Based on Updated Hazard Map and Its Effect on Regular RC Structures

The Proposition of an EI Equation of Square and L–Shaped Slender Reinforced Concrete Columns under Combined Loading

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